rs201238640

Positions:

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PM1PM2PM5PP3_StrongPP5_Very_Strong

The NM_206933.4(USH2A):c.13274C>T(p.Thr4425Met) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000446 in 1,614,152 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T4425K) has been classified as Likely pathogenic.

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000044 ( 0 hom. )

Consequence

USH2A
NM_206933.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:8U:1

Conservation

PhyloP100: 7.60

Variant links:

Genes affected

USH2A (HGNC:12601): (usherin) This gene encodes a protein that contains laminin EGF motifs, a pentaxin domain, and many fibronectin type III motifs. The protein is found in the basement membrane, and may be important in development and homeostasis of the inner ear and retina. Mutations within this gene have been associated with Usher syndrome type IIa and retinitis pigmentosa. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2008]

USH2A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 ACMG points.

PM1

In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 6 uncertain in NM_206933.4

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr1-215674637-G-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 1513496.Status of the report is criteria_provided_single_submitter, 1 stars.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.948

PP5

Variant 1-215674637-G-A is Pathogenic according to our data. Variant chr1-215674637-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 438011.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-215674637-G-A is described in Lovd as [Pathogenic]. Variant chr1-215674637-G-A is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
USH2A	NM_206933.4 linkuse as main transcript	c.13274C>T	p.Thr4425Met	missense_variant	63/72	ENST00000307340.8	NP_996816.3	O75445-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
USH2A	ENST00000307340.8 linkuse as main transcript	c.13274C>T	p.Thr4425Met	missense_variant	63/72	1	NM_206933.4	ENSP00000305941.3		O75445-1
USH2A	ENST00000674083.1 linkuse as main transcript	c.13274C>T	p.Thr4425Met	missense_variant	63/73			ENSP00000501296.1		O75445-3

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152168

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000438

AC:

AN:

250930

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135602

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000882

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000445

AC:

AN:

1461866

Hom.:

Cov.:

AF XY:

0.0000385

AC XY:

AN XY:

727232

show subpopulations

Gnomad4 AFR exome

AF:

0.0000896

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.0000504

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152286

Hom.:

Cov.:

AF XY:

0.0000806

AC XY:

AN XY:

74460

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000882

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000799

Hom.:

Bravo

AF:

0.0000227

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:8Uncertain:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Pathogenic:4Uncertain:1

Pathogenic, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Likely pathogenic, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 22, 2024	This sequence change replaces threonine, which is neutral and polar, with methionine, which is neutral and non-polar, at codon 4425 of the USH2A protein (p.Thr4425Met). This variant is present in population databases (rs201238640, gnomAD 0.008%). This missense change has been observed in individuals with USH2A-related conditions (PMID: 24944099, 31266775, 32188678, 32581362). ClinVar contains an entry for this variant (Variation ID: 438011). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt USH2A protein function with a positive predictive value of 95%. This variant disrupts the p.Thr4425 amino acid residue in USH2A. Other variant(s) that disrupt this residue have been observed in individuals with USH2A-related conditions (PMID: 30718709), which suggests that this may be a clinically significant amino acid residue. For these reasons, this variant has been classified as Pathogenic. -
Likely pathogenic, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Uncertain significance, flagged submission	clinical testing	Eurofins Ntd Llc (ga)	Jun 28, 2018	- -

Usher syndrome

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Mar 26, 2021

Variant summary: USH2A c.13274C>T (p.Thr4425Met) results in a non-conservative amino acid change located in the Fibronectin type III domain (IPR003961) of the encoded protein sequence. Five of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 4.4e-05 in 250930 control chromosomes. This frequency is not significantly higher than expected for a pathogenic variant in USH2A causing Usher Syndrome (4.4e-05 vs 0.011), allowing no conclusion about variant significance. c.13274C>T has been reported in the literature in multiple individuals affected with Usher Syndrome and autosomal recessive Retinitis Pigmentosa (e.g. van Wijk_2004, Baux_2007, Neverling_2012, van Huet_2015, Bonnet_2016, Toms_2020, Gao_2021). These data indicate that the variant is very likely to be associated with disease. In some of these cases, the variant was reported in complex alleles with p.Arg4115Cys (e.g. van Wijk_2004, Bonnet_2016) and p.Cys759Phe and p.Arg4115Cys (e.g. Baux_2007). To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Two other clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation, citing the variant as likely pathogenic (n=1) and uncertain significance (n=1). Based on the evidence outlined above, the variant was classified as pathogenic. -

Retinitis pigmentosa 39

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Baylor Genetics

Feb 19, 2024

- -

Retinal dystrophy

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Institute of Human Genetics, Univ. Regensburg, Univ. Regensburg

Jan 01, 2019

- -

Retinitis pigmentosa

Pathogenic:1

Likely pathogenic, no assertion criteria provided

research

NIHR Bioresource Rare Diseases, University of Cambridge

Jan 01, 2015

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.49

BayesDel_addAF

Pathogenic

0.20

BayesDel_noAF

Pathogenic

0.24

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.49

Eigen

Pathogenic

0.88

Eigen_PC

Pathogenic

0.78

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.89

M_CAP

Pathogenic

0.40

MetaRNN

Pathogenic

0.95

MetaSVM

Uncertain

0.27

MutationAssessor

Pathogenic

4.1

PrimateAI

Uncertain

0.59

PROVEAN

Uncertain

-4.0

REVEL

Pathogenic

0.65

Sift

Uncertain

0.0010

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.94

MVP

0.98

MPC

0.24

ClinPred

0.99

GERP RS

4.7

Varity_R

0.86

gMVP

0.70

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over